WISC 1949 Object Assembly Test Puzzle: Block Design Plus Test Problems Flip Book vintage earthenware bowls this one of a Master

this one of a Master Samuel Brown

9 1/2" across when open

or at least observed these beauties on the sea

Earlyish 20th c I believe

WISC 1949 Object Assembly Test Puzzle: Block Design Plus Test Problems Flip Book vintage earthenware bowls this one of a MasterI've sold lots of sets of color cubes, but I especially love these small look alike sets produced in West Germany for the WISC IQ test, which were used by the test taker to recreate increasingly complex designs shown by the test administrator within specified time limits. These sets have become quite collectible, and no wonder hard to beat a classic design object housed in a box with "The Psychological Corporation New York, NY" printed in silver on